He must remember that he must fills his daily needs so he can still aware that he playing gambling to release his stress of his job. You can be besides of him after he end his job at that day and if he wants to playing gambling, you can watch him playing gambling and reminds him if he almost break his limitation. It needs a strong self controls to say it is enough to playing gambling for this day but I am sure he can do that and you can helps him to solve his problem.
This is a new occupation that you are proposing for me, in as much as I would want him to stop his bad habit, but I think this is to extreme a step for me to take regarding my convenience and availability, I'm a very busy person and wouldn't be having enough time to be babysitting a grown man every day at his place of work and also I'm running at the risk of even being influenced by the events of the gambling house since I was an addict myself earlier in my days and one of the ways I stopped my habit was to stop visiting physical casinos to reduce drastically the drive to over gambling in me.
I call him regularly to remind him of our agreement daily and check up on him when he should have gone to make the deposits. I think that is enough positive energy. I wouldn't complicate issues for myself while being of help to another person. Thank you for your suggestions though